Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh loi » thanh hoa, thanh hai, thanh lap
va thanh » gia thanh, ban thanh, va tinh
dao tuc » dao duc
loi cua » loai cua, hoi cua, doi cua
dao xuc » dao duc, dao xu, dao xuan
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) or (van xay)) hoi. hieu va ((dao xuc) OR (dao tuc)) va thanh loi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (van xay)) hoi. hieu va ((dao xuc) OR (dao tuc)) va thanh loi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang xa) or (van xay)) hoi. hieu va ((dao xuc) OR (dao tuc)) va thanh loi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (van xay)) hoi. hieu va ((dao xuc) OR (dao tuc)) va thanh loi cua tre*.